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K E. A. TRAPP.

DUMPING UAR. No.n 525,727. Pate'nted Sept. 11, 1894.

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3 Sheets-Sheet 3. E. A. TRAPP.

DUMPING CAR.

No. 525,727. Patented Sept. 11, l1894.

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Wl'zessess- UNITED STATES PATENT OFFICE.

EDWARD A. TRAPP, OF NEW YORK, N. Y.

` DUMPING-CAR.

SPECIFICATION forming' part Of Letters Patent No. 525,727, datedSeptember 11, 1894.

Application iilecl February 27, 1894. Serial No. 501,734. (No model.)

To @ZZ whom it may concern.-

Be it known that 1, EDWARD A. TRAPP, a citizen of the United States,residing at New York, in the county of New York and State of New York,have invented certain new and useful Improvements in Dumping-Gars; andIdo hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

.My invention relates to dumping cars and is more specifically intendedto be applied to cars which are dumped by the application of powereither of compressed air or other agent under control of the engineerupon the locomotive pulling the train.

The invention here described is an improve-` ment upon the constructiondisclosed in United States patents; No. 493,317, granted to me March 14,1893; No. 513,446, grantedlto me January 23, 1894, and No. 513,447, ofthe same date.

In constructing dumping cars which may be depended upon to completelyfree themselves from their contents when dumped it is necessary to tipthe car to such an angle of inclination as will cause every particle ofits contents to overcome the adhesion to the car floor and slip out onto the dump. As the car body must, of course, overhang the wheels of thetruck, it is necessary, where the car is swung about a pivot rigid uponthe supporting frame, to build said supporting frame at a considerableheight in order to obtain the necessary inclination in dumping. Thebuilding of a high frame increases the cost of construction, the lengthof the working parts of the tipping apparatus and renders the car ofunstable equilibrium on account of the elevation of its center ofgravity, while it also, in many cases, increases the labor of loadingit.

To avoid the above mentioned diiculties and disadvantages and at thesame time secure an acute angle of dumping 4which shall insure thecomplete emptying of the ear, I have hit upon the idea of securing theswinging car body to a supporting frame by a pin and slot connectionwhich shall allow of considerable lateral motion of the car body whenbeing dumped. In this way the center of rotation of the car body beingshifted toward the wheels upon that side where the car is dumping thebase of the right-angle triangle, of which the floor represents thehypotenuse, is considerably shortened and consequently the desired angleof inclination can be obtained Without unduly increasing the length ofthe perpendicular of said triangle. A

The preferred form of apparatus for carrying out and embodying my ideais illustrated in the accompanying two sheets ot drawings, in which-Figure 1, is an end view and partial section of a car embodying myinvention, the car being shown in dumping position in full lines and incarrying position iu dotted lines. Fig. 2, is a detail of the pin andslot connection, which is the essence of my invention, a section beingtaken on line 2, 2, ot' Fig. 3. Fig.

,3, is another view of the slotted standard,

section being taken on line 3, 3, of Fig, 2. Fig. 4, is a detail showinga horizontal slot. Fig. 5, is a detail showing a curved slot. Fig. 6, isa detail showing the form of curved jaws for a mechanism calculated todump the car on either side. Fig. 7, illustrates a modification in whichthe pin is on the truck frame and the slot is in the casting attached tothe car body.

Throughout the drawings like reference gures refer to like parts,

1, is the car truck resting on the wheels 2, which run upon 'the railsV3, in the usual manner. 4, is a supporting frame resting on said cartruck and rigidtherewith.

5, is a slotted standard preferably made double in form, as shown inFig. 3, which rests upon the supporting frame approximately in thelongitudinal center of the car. Of course, there are two or more ofthese standards 5, supporting the ends and, if desired, the intermediatepoints of the car body.

6, is the swinging car body which moves or oscillates upon thesupporting frame by virtue of the connection aiorded by the pin 7, whichis rigid with the car body and the coacting slot 8, which is formed inthe standard c IOO 513,447 above referred to and the parts of ties whichbear upon the friction plates 16,

on the bottom of the car body and thereby eifectuate the tipping of saidcar body when the lever is oscillated by means of the piston rod 9. Theconnection of said piston with the lever 14, is by means of the pin andslotted head 9a. This action is rendered possible notwithstanding thefact that the car bodyvhas ashifting pivot while the lever has a fixedfulcrum by means of the said friction rollers 15, and their co-actingplates 16.

As above mentioned the casting 17, which is rigid with the car body 6,has curved jaws 17, and 17", which as the car body tips move upon thefriction rollers 19, and 1S, respectively, which are mounted in thestandard 5, and this mechanism, together with the pin and slot 7, and 8,control the character of motion of the swinging car body 6.

lVhen the car body is in a horizontal position ready to carry the loadit is held down by the dog 21, which is pivoted to the supporting frameby the pin 22, and normally held in the position shown by the weight 23, but which, when the dumping lever 14, is drawn down into the positionshown in dotted lines, is forced by reason of the end 24, of said leverbearing against the raised piece 25, on said dog, into such position ascauses it to overhang the pin 26, upon the car body and hold said carbody in a horizontal position until the dumping lever is forced uppreparatory to dumpingA the car. All of this mechanism, including thelever 30 for tripping the locking mechanism by hand, is fully describedand claimed in my Patent No. 513,447 above mentioned; but I have foundit necessary inlview of the independent motions of the dumping lever 14,and car body to provide a spring latch for this locking dog which isrepresented by the pin 26, mounted in the oscillating piece 27, pivotedto the car body at 28, and normally forced out by the spring 29. Y 1t,therefore, for any reason the dumping lever 14, should come down andlock the dog 21, over in its engaging position before the car body hadswung far enough to place the pin 26, under the dog 21, the spring latcharrangement, above described, Will allow this pin 26, to slip over theend of the dog and lock. l

As also described in my Patent No. 513,447, Iemploy a swinging door 3l,for the car which by means of the pin on the lugs 34, sliding in theslotted link 32, which is pivoted to the supporting frame 4, at 33,-'isformed to travel with the car body during the initial portion of itsdumping motion. As a considerable 1n portion ofthe said dumping motionis a 1lb eral motion by reason of the pin and slotoonnection of the carbody to the supporting;F frame, it is evidentthat this lateral motionmust be allowed for in the door 31, also, and to accomplish this I pivotthe link 32, at the point 33, and give it a slotted connection at itslower end by means of the slotted link 35. Of course achain or otherexible connection might be substituted for slotted link 35.

It is evident that the slot 8, in the standard 5, may either be straightor curved and tho two variations are shown in Figs. 4, and 5; and it isalso evident that fstraight, theliot may be so disposed that its endtoward .tio side where the car is dumping may be immlower horizontalplane than that in whiehtio pin rests when the car body is inacondition` of rest, all as shown in Fig. 2; or, that boul ends of theslot may be in the same horim- 9o tal plane as in Fig. 4.

When the car dumps only to one sidetho jaws 17 a, and 17h, are notexactly similar bllt are so shaped as to economize material Imi give thedesired characteristics to the dum '95 ing and return motions. It may bedesi ,t however, to build a car which would dump on either side and inthat case the friction rollo!! 18, and 19, and their cooperating jaws17,lnd 17, would be symmetrically arranged with lo reference to thecenterline, as shown in 6, and the slot 8, would be extended on either lf side of said centerline, as shown in said gnnf' V The rod 36, brokenot, indicates the connaction for automatically operating the air vlv. lo

In the modification shown in Fig. 7, thof 35, is mounted in the standard5, while 7 slot 36, is in the casting 17, attached to the car body. Itis evident that the pin andllot Y 35, and 36, will cooperate as do thepin and I I slot 7, and 8, in the first described form of in Q vention.

The operation of my invention, so fargo has not already been describedis as follol: The car body 6, being in the horizontal pin tion shown inthe dotted lines, the powltim applied by compressed air or other uidtddrive up the piston rod 9. This forces up end 24, of the dumping lever14, until their@ tion roller upon that end comes in conm u with theplate 16, on the bottom of the body. This motion is suiiicient tonnlockthof 5j dog 21, which drops into the position suoli in Fig. 1, andthereby releases the pin f1", the latch upon the car body. Furthermotion nl of the piston and dumping lever 16, beginne, tip the car bodyitself. As the car body ho` gins to tip it takes on a lateral motion,the pin 7, movingin the slot 8, as soon as the curved jaw 17", begins tobear against iso la friction roller 18. The further tipping tion resultsin further lateral or /hol'izonfln motion at the pin-and slot connectionacengl..` ing to the character of the curves of the M 17h. When thepiston has reached the end of its stroke the pin 7,-is in the outermostend of the slot 8. The door 31, has followed the tipping and lateral orhorizontal motion of the car body 6, by virtuev of its flexible supportin the pivoted link 32, until it has reached the lower end of said linkwhen its further motion has ceased and the contents of the car have beendischarged beneath it. Areversal of the power apparatus draws the carback to the horizontal position giving it a combined tipping and lateralor horizontal motion, de

tex-mined by the curves of thejaw 17, which now comes into play againstthe friction roller 19. When back in its horizontal position, the carbody is locked by the dog 2l, in the manner previously described.

The advantages of this invention are as above stated, that by shiftingthe pivotal point of the car body toward the side as it is dumped, amuch greater angle of inclination is obtained than would be the case ifthe pivot were rigid, in view of the action of the car truck wheels inlimiting the motion of the outerend of the car body. At the same time ifthe slot 8, is given an inclination, as shown in Figs. 1, 2,' and 5, theslight vertical component of motion of the pin in said slot helps to, ina measure, relieve the power apparatus of the work of dumping. Thetendency evidently is for the car body to slide down this inclined planeand, to a certain extent, dump itself. The added work of dragging thecar body up the incline after dumping is of comparatively littleimportance because the car body is then empty and light. It is evidentthat by properly laying out the inclination of the slot 8, and thecurves of the jaws 17 a, and 17h, the work of dumping the car body couldbe exactly equalized, for a load of a given weight, with the work ofbringing it back to its normal position, and thereby any waste of airpressure or other power employed would be avoided.

Of course various changes could be made in the construction of theslotted standard and the pin connection without departing from thespirit of my invention. Similar reversals or variations of mechanism,which will be obvious to the skilled mechanic, could be made, but allsuch I desire to include in my invention. It is obvious also that thisinvention would apply equally well to a car to be dumped by hand or byany other power than that illustiated, but the same advantages ofconstruction and of equalization of effort in dumping and retracting thecar body would obtain.

Having, therefore, described my invention, what I claim as new, anddesire to protect by Letters Patent, is

1. In a dumping car, the combination of the truck and supporting framethereon, the swinging car body, the pin and slot connection between saidsupporting frame and said swinging car body, one or more pins mounted onone of the two last mentioned elements of the combination, to wit, thesupporting frame or the swinging car body, and curved jaws mounted onthe other of said two last mentioned elements and embracing the abovedescribed pin or pins, said pin or pins and co-operating jaws, togetherwith the pin and slot connection, positively controlling the motion ofthe car body in dumping, substantially as described.

2. In adumping car, the combination of the truck and supporting framethereon, the swinging car body, the pin and slot connection between saidsupporting frame and said swinging car body, one or more pins mounted onone of the two last mentioned elements of the combination, to wit, thesupporting frame or the swinging car body, and curvedjaws mounted on theother of said two last mentioned elements and embracing the abovedescribed pin or pins; said pin or pins and co-operating jaws, togetherwith the pin and slot connection, positively controlling the motion ofthe car body in dumping, together with automatic means for producing thedumping of the car body, substantially as described. Y

AA3. In a dumping car the combination of the truck and supporting framethereon, the slotted standard on said frame, the pin which is mounted ina casting rigid on said car body, which pin moves in the slot in saidstandard, the pins mounted in said standard, and curved jaws on saidcasting which engage said last mentioned pins and which in connectionwith the first mentioned pin and the slot in the standard control themotion of the car body as it dumps, together with means for moving saidcar body about these pins, substantially as described.

4. In a dumping car the combination of the truck and supporting framethereon, the slotted standard ou said frame, the pin which is mounted ina casting rigid on said car body, which pin moves in the slot in saidstandard, the pins mounted in said standard, and curved jaws on saidcasting which engage said last mentioned pins and which in connectionwith the first mentioned pin and the slot in the standard control themotion of the car body as it dumps, together with mechanism operated bycompressed air for moving said car body about these pins, substantiallyas described.

5. In a dumping car the combination of the truck and supporting framethereon, the slotted standard on said frame, the pin which is mounted ina casting rigid on said car body, which pin moves in the slot in saidstandard, the pins mounted in said standard, and curved jaws on saidcastingwhich engage said last mentioned pins and which in connectionwith the first mentioned pin and the slot in the standard control themotion of the car body as it dumps, friction rollers on the pins,together withmeans for moving said car body about these pins,substantially as described.

6. In a dumping car the combination of the ICO truck and supporting,rframe thereon, the swinging ear body and the pin and slot connection bywhich said car body is pivoted to said frame and given freedom forlateral motion thereon, the door for said car, the links `pivoted to thesupporting frame and supporting said door, and the slotted connectionfrom the frame to the lower portion of said links whereby they arepermitted to accommodate themselves to the lateral motion of the carbody, substantially as described.

7. In a dumping car the combination of the truck and the supportingframe thereon, the

